Kazan Helicopters Mi-17-1V Flight Manual page 99

M,,·17·1B. Flight manual
Execute downwind turn at RS
=
240°
±
DA (120°
±
DA in right-hand ap-
proach traffic pattern) or being at desired MRS (magnetic radio bearing)
in 3 min 27 s after takeoff.
Execute base turn at RS
=
240° ± DA (120° ± DA in right-hand approach
traffic pattern) or being at the estimated MRS. On the base leg descent at
a rate of 2 to 3 mls and establish a forward airspeed of 155 km/h.
Descent down to a height of 200 m.
Execute final turn in horizontal flight at a height not less than 200 m and
an airspeed of 150 km/h. Initiate final turn at RB
=
285
0
± DA (75° ± DA in
right-hand approach traffic pattern) or being at the desired MRS.
(3) Initiate all the turns and abeam flying at the estimated moments of time
and report to the flying control officer. At initiation of final turn the pointed
end of the ADF pointer set close to the heading selector pointer upper
edge to make an angle of about 15° with the latter (Ref. to Fig. 4.4).
RWY
Fig. 4.4 Course Indicator Display before Capturing Landing
Heading at Correct Execution of Turn
In correctly executed final turn both pointers should align at the moment
when the helicopter is approximately 30° short of the landing heading
(Ref. to Fig. 4.5).
Continue turning with the pointers aligned. If the angle between the ADF
pointer and the heading selector bar remains constant or .even increases
during the first half of turn, reduce the bank angle. If the ADF pointer be-
gins lagging behind the heading selector pointer after alignment, increase
the bank angle but not in excess of 15°. At zero drift recover from turn In
such a way that the aligned ADF pointer and heading selector pointer set
under the course indicator (nHn) index. If drift is present set the aligned
pointers with the drift angle accounted for, and maintain the heading with
a crab angle.
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